Folding-machine.



FOLDING MACH APPLICATION men JAN-13,1910.

Pataamed Aug: 24, 1915.

6 SHEETS-SHEET I.

0. W. JOHNSON.

FOLDING MACHINE.

' APPLICATION FILED JAN.13.1910. mmms, I Patented Aug. 24, 1915.

6 SP'ETS-SHEET 2.

f Elma 1M WWW (fa/ 4108010 O. W. JOHNSON.

FOLDING MACHINE.

APPLICATION FIL'ED 1AN.13, 1910.

Patented Aug. 24, 1915.

6 S.HEETSSHEET 3.

0 w w W a 0. W. JOHNSON.

FOLDING MACHINE.

APPLICATION FILED JAN. 13. 1910.

6 SHEETSSHEET 4.

awe/Mo;

Patented Aug. 24., 1915.

6 W (fa/(41680761.

0. w. JOHNSON.

FOLDING MACHINE.

APPLICATION FILED JAN. 13. I910.

6 SHEETS-SHEET 5.

witnesses Patented Aug. 24, 1915. a

0. W; JOHNSON.

FOLDING MACHINE- APPLICATION FILED JAN. 13. 1910. Patented Aug. 24,1915.

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j e w MW w w w 3 0 W 11 I M AU/% 0 u n a u u a o a J Ma. 0 a can a a u,nn o ddw ()1 W 1 Q x 6 6 .0 7 2 g up 7 m %z I 2 m; p 6 M v l n l M M J F1 g OLIVER W. JOHNSON, 0F GENEVA, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS,TO THE CLEVELAND FOLDING MACHIN'E COMPANY, OF CLEVELAND, OHIO, .ACORPORATION OF OHIO.

FOLDING-MACHINE.

Specification of Letters Patent.

Patented Aug. 2a, 1915.

To all whom it may concern:

Be it known that I, OLIVER W. JOHNSON, citizen of the United States,residing at Genevafin the cbunty of Ashtabula and State of Ohio; haveinvented certain new and useful Improvements in Folding-Ma chines, ofwhich the following is a specification.

This invention comprehends certain new and useful improvements in thatclass or type of paper folding machines that operate upon the sheetbuckling principle, and relates particularly to improvements in themachine disclosed in my former Letters Patent of the United States,#893,629, dated July 21, 1908..

One of the main objects of the present in-' vention is the provision ofcertain improvements in the means which is embodied in the crossfeedmechanism of the device which is.

arranged, in the operation of rightangle folding, to pass the oncefolded sheet to the second folder in order that the latter may make asecond fold at right angles to the first fold, said improvementsconsisting in the employment ofs'pecially devised and arranged rollersand actuating mechanism therefor to take the place of the horizontallydisposed belt in the patent above mentioned.

Another object of the invention is an 1mproved stop device to be usedinconnection with the first folder and arranged to stop the sheet at thedesired point so that the sheet may be buckled.

The invention also has for its ob ect, an improved constructionandarrangement of stop for use in the folders which make the second andthird folds in a'sheet in the operation of right angle folding.

Another object of the invention is the employment of deflectors whichare arranged to pass the paper directly through certain of the foldingrolls as will be hereinafter m'ore specifically described on to theother parts of the mechanism wheneverit is desired to cut out a fold.And a further object of the invention is an improved arrangement ofobliquely disposed. rolls .de:

signed to feed the paper downwardly fromthe second folderin the rightangle series toithe third folder, such rolls being so &I".'

ranged thatthey may diverge more or less according to the requirementsof the case, for instance the thickness of the stock employed.

With these and other objects in view as will more fully appear as thedescription proceeds, the invention consists incertain constructions,arrangements and combinations of the parts that I shall hereinafterfully describe and claim.

For a full understanding of the invention, reference isto be had to thefollowing description and accompanying drawings in which:

Figure 1 is a side elevation of a portion of a paper folding machineembodying the improvements of my invention; Fig. 2 is a detail sectionalview on an enlarged scale, cthe section being taken substantially on theline, 2-2 of Fig. 1, through the plate of the first folder; Fig. 3 is atop plan view of the stop which is illustrated in the precedingsectional-view; Fig. 4 is a detail'view of the stop detached, with partsextended from each other and in juxtaposition; Fig. 5 is a perspectiveview of the obliquely disposed down feed rolls which are arranged topass the paper from the second right angle folder to the third folder inthe right angle series; Fig. 6 is a horizontal sectional View throughthe supporting device for the oblique rolls; F ig. 7 is a horizontalsectional view on an enlarged scale through a portion of the parallelfolding inechanism illustrating one of the deflectors which is employed;Fig. 8 is a perspective view of such deflector; Fig. 9 is a perspectiveView partly in full lines and partly in dotted lines of the stop for thesecond and third folders in the right angle series; Fig. 10 is ahorizontal sectional view through a portion of the machine, the sectionbeing taken on a line which will show the bottom portion of the crossfeed mechanism and some of the obliquely disposed rolls, the plane ofthe section being indicated by the line 10-10 in Fig. 12; Fig. 11 is aview similar to Fig. 10 but taken on a slightly higher plane and to showthe use of a deflector at the second folder in the right angle series;Fig. 12 is a side elevation, partly broken away of a portion of thecross feed mechanism; Fig. 13 is detail sectional view on the line 1313of Fig. 12; Fig. 14 is a side elevation of the bar which supports thespools which form part of the means for passing the once folded sheet tothe second set of folders in the operation of right angle folding; Fig.15 is an enlarged transverse sectional view, the section being takenthrough the down feed portion of the cross feed mechanism designed topass the once folded sheet to the second set of folders in the operationof right angle folding and illustrating a brush which may be employed aswell as a deflector which may be used to pass the sheet directly fromthe feed table to the second set of folders without being acted upon bythe first set of folders; Fig. 16 is a detail horizontal sectional Viewillustrating a modification in the means for driving the spools; and,Fig. 17 is a detail sectional view illustrating the use of a deflectorfor the rolls of the third folder.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the accompanying drawingsby the same reference characters.

The paper to 'be folded passes from a feed table 1, in between therollers A and B of the first folder upwardly between the longitudinallyslotted and superposed plates 2 and 3 which are'spaced' from each otheras best illustrated in Fig. 1, the sheet being engaged by a stop deviceillustrated bestin Figs. 2, 3 and 4, and caused to buckle by thecontinued rotation of the rolls A and B so that it will be caughtbetween the roll B and the third roll O of the first folder whereby tomake the first fold in the sheet, the folded sheet being then passeddown from the rolls B and G into the cross feed mechanism. This stopjust above referred to comprises a plate 4 which may be rectangular asshown and which is adapted to lie upon the upper plate 2 of the folderacross one of the slots of said plate. The plate 4 is formed at itsfront edge with a downwardly extending foot 5 terminating in a forwardlyprojecting toe 6 preferably formed with a slightly upwardly curved freeextremity 7 The foot 5 with its toe 6 extends downwardly into the slotof the plate 2 over which the plate 4 is placed so as to guide the paperproperly into engagement with a downwardly extended heel portion 8formed at the juncture of the foot 5 and toe 6 and depending therefrom.

'This heel 8 constitutes the element with which the advanced edge of thepaper di rectly contacts. In order to hold the plate 4 with the partswhich it carries under the gagement with a nut 11. The nut 11 is formedwith oppositely curved edges 12 terminating in shoulders 13 and is alsoformed below said edges and shoulders with oppositely extended lugs 14.The nut 11 is adapted to fit in the slot over which the plate 4 extendswithits lugs 14 extending underneath the plate 2, and between the latterand the plate 3, and with the shoulders 13 bearing tightly against theopposite walls of the slot. It will thus be understood that theoppositely curved walls 12 of the nut terminating in the shoulders13will cause said nut to securely bind in the slot when the bolt 10 isscrewed down against the tension of its encircling spring whereby tosecurely hold the plate 4 in any desired ad justed position. In order toentirely remove the plate and its concomitant parts, it is onlynecessary to loosen the bolt 10 sufficiently to permit the turning ofthe nut 11 into alinement with the slot in which it has been placedwhereupon the nut may be readily detached. Preferably the top plate 2 ofthe folder has a scale 15 secured to it as indicated in Fig. 3 so thatthe position of the plate 4 may be determined in advance, withoutexperimenting, according to the work in hand.

As will be seen by referenceto my prior patent before mentioned, as wellas the ac companying drawings. in which the same parts'are illustrated,I have provided my improved folding machine with what I have termedcross feed mechanism arranged'to automatically pass the once foldedsheet to the second' folder in the right angle series so that the latterwill make a second fold at right angles to the first. This cross feedmechanism embodies a series of horizontally disposed rolls 16 arrangedin pairs as best illustrated in Figs. 11 and 12, 13 and 15, the oncefolded sheet being recei 'ed directly by the uppermost pair of rolls 16as it comes out from between the folder rolls B C in its downwardmovement and being passed successively from one pair of rolls to thenext pair below until the then once folded sheet comes into contact withthe laterally moving part of the cross feed mechanism. It is in thislaterally movable part of the cross feed mechanism that the presentinvention differs in one respect from the prior patent before mentioned,but before describing the same, it should be remarked that in thepresent embodiment of the device, these rolls 16 receive their motionpreferably by the following means. A sprocket chain 17 extends around asprocket wheel 18 on a stub shaft 19 which projects out from one sidebar of the supporting framework of the machine said sprocket chainreceiving its motion from any desired part of the driving devices, say,the main shaft which drives the folding rolls of the first folder. Thestub shaft 19 also carries a spur pinion 20 meshing with a correspondingpinion 21, the hub of which is splined on a shaft 22, so that it may bedrawn into or out of mesh with the pinion 20. The shaft 22 extendstransversely across the supporting framework as best illustrated inFigs. 10 and 12 and carries a gear wheel 23 which meshes with an idlersprocket 24, from which motion is directly imparted to the lowermost setof rolls 16 and thence through intervening idler pinions and shafts, tothe succeeding pairs of rolls above it. By this means, the entire set ofrolls is driven in such a direction that the paper will be feddownwardly between them.

It is to be understood that the rolls of each pair are set apart just asuflicient distance to positively hold the once folded sheet down on thelaterally movable part of the cross feed mechanism and support it onsuch laterally movable part and prevent it from bending down by its ownweight, but are not close enough together to present any appreciablefriction against the paper and bar the transverse movement thereoftoward the second folder. This transversely traveling portion of thecross feed mechanism, which is one of the improvements of the present invention, comprises a series of rollers or spools 25, mounted on separateshafts 25* secured at one end in a transversely extending bar 26 andarranged in a horizontal line as best indicated in Figs. 10 and 12. Eachof the spools or rollers 25 is in the form of a double truncated cone.That is to say, each one has its periphery tapering toward the middlethereof as best illustrated in Fig. 13 and this middle point is disposeddirectly underneath the lowermost pair of rolls 16 so as to directlyreceive the paper or once folded sheet as it is fed downwardly thereuponby such rolls. In order to positively drive all of the rollers or spools25, each one of them is provided, with a sprocket-wheel 27, and asprocket chain 28 is so arranged that the upper stretch passes over andengages all of the sprocket wheels 27. The sprocket chain 28 also passesover a driving sprocket 29 which is ournaled on a stub shaft 30journaled in the cross bar 26 near one end thereof as best illustratedin Figs..10 and'12. The wheel 29 receives its motion from a bevel pinion31 secured to the shaft 22. In order to maintain the sprocket chain 28at the requisite tension, I have provided a tension roller 32journaledin the lower end of an arm 33 which is secured to and dependsfrom the cross bar 26. By means of these double tapered or oppositelyand inwardly beveled rollers or spools 25 the lower edge of the oncefolded sheet is maintained in a true plane, as the sheet travelstransversely toward the second folder, and it is insured that the entiresheet will be thus presented to the second folder without any danger ofcrimping, or rumpling in the operation thereof.

It is to be understood that any means may be employed for rotating thespools 25. For instance, instead of the sprocket chain 28 just abovedescribed and its correlated parts, I may us" a construction andarrangement of parts such as is illustrated in Fig. 16. In this view, 25designates the spools which are mounted on the stub shafts that arejournaled in a cross bar 26", the shafts of the spools being extendedthrough the cross bar and carrying crown gear wheels 27 that mesh withspur gears 27 b secured on the shaft 27 j ournaled in brackets 26 thatproject from the bar 26 Motion may be 'com-, municated to the shaft 27in any desired way as by the shaft 22 which is provided at one end witha bevel pinion 22 and its opposite end with a bevel pinion 22 meshingwith the corresponding pinion 27 on one end of the shaft 27. Bevelpinion 22 meshes with a corresponding pinion 22 on the shaft 22 whichcorresponds to the shaft 22 above described. In order that the bar 26 or26 may be adjusted so that the series of spools which it carries may beheld in a true horizontal line or at any desired height, said bar ispivotally mounted to swing about a substantially horizontal axis. In thepresent embodiment of the invention, althoughit is to be understood thatthe invention is not limited thereto, the said bar is mounted to swingabout the shaft 30, as shown in Figs. 12 and 14, which carries thesprocket wheel 29, and an adjusting screw 29, mounted in a bracket 29bears against the opposite end of said bar so that the same may bevertically adjusted in an evident manner.

A B and C designate respectively the triangularly arranged verticallydisposed rolls of the second folder, the same being located at one endof the series of rollers or spools 25 as best illustrated in Fig. 10. Asthe once folded sheet is passed laterally in between the rolls A and Bit enters in between the vertically disposed and obliquely arranged stopplates 3 1 and 35 of the second folder in the right angle series. Inorder to properly stop the incoming sheet at thev desired point so.

that the continued rotation of the rolls A and B will cause the sheet tobuckle and be folded between the rolls B and C and form a second fold atright angles to the first, my improved stop is provided. This stop, asbest seen in Fig. 9, embodies two spaced bars designated 36 and 37 toone of which are secured by brazing, soldering or by any desired means,laterally spaced and forwardly diverging curved fingers 38 between whichthe sheet passes.v The bar 36 carrying the fingers 38 is mounted inbetween the plates 34 and 35, while the bar 37 is located on the outerside of the plate 34,

thumb screws 39 working through and in the bars 36 and 37 so as to bindthem se-v curely in place after they have been adjusted to the desiredpoint. It is to be understood that a corresponding stop device isprovided for the third folder in the right angle series but as the partsof such folder are not essential to full disclosure of the presentinvention, a full description and illustration thereof are omitted,together with the stop bar therefor. It is to be understood, however,that such bar is exactly like the stop bar just described.

It is essential in some classes of work that the second folder in theright angle series be omitted and that the paper be folded only twice(the folds being at right angles to each other) and then passed directlyto the stacking box. In order to accomplish this end, I have providedmeans whereby the second folder in the'right angle series may beentirely out out and the paper passed directly to the down feedmechanism which in turn will pass it to the third folder. In the presentinstance the arrangement of 'parts whereby I accomplish this result,includes a foot or base 40 which is formed on the plate 35 and which isarranged to be detachably secured as by stub bolts or the like, to aledge 41 of the supporting framework, said ledge also supporting therolls A B and as best illustrated in Fig. 10. I have also provided adeflector bar 42 shown best in Fig. v11. This deflector bar is providedwith a base 01' foot. 43 similar to the fOOt 40, so that the plates 34and 35 may be entirely removed and the deflector bar 42 substitutedtherefor with its curved edge 43 vertically disposed in between therolls A and C close to butspaced from the roll B \Vith this deflector inplace, it is clear that as the once folded sheet is passed in betweenthe rolls A and B it will be deflected by the curved edge 43 of the bar42 and passed directly in between the rolls B and C which in turn willpass it between the obliquely disposed rolls Hof the down feed mechanismwhich I shall now describe. This down feed mechanism constitutes themeans for passing the twice folded sheet down into the third folder ofthe right angle series.

Referring now particularly to Figs. 1, 5, 6 and 10 it will be seen thatthe obliquely disposed rolls 44 are arranged in pairs, one pair aboveanother, and that they aresupported entirely at one end, the ends whichare contiguous to the rolls B and 0 being entirely free and preferablyrounded, so as to insure the proper entrance of the twice or once foldedsheet between them. One roll 44 of each pair is journaled to rotateabout a fixed axis in a bracket 45 secured to one of the framework bars,and the said bracket is provided with upper and lower pintle ears 46spaced from each other as illustrated best in Fig. 5. 47 designatesanother pintle ear which is interposed between the ears 46, a pintle 48passing through all of said ears, as shown. The pintle ear 47 is formedon a bar 49 which supports the other rolls of the pairs, and it willthus be seen that the rolls of one set may be correspondingly movedtoward or away from their companion rolls so as to produce more or lessdivergence between the free ends of the rolls according to therequirements as for instance, the particular weight or thickness of thestock being worked upon. In order to properly adjust the rolls 44, anarm 50 projects outwardly and laterally from the pintle ear 47, said armbeingforked at its extremity as indicated at 50 -and there being a bolt51 provided which is received in the fork of the arm and which carries anut at its outer end and which is threaded in the framework bar 52 atits opposite end as best illustrated in Fig. 6. A spring 53 encirclesthe bolt 51 and presses outwardly upon the arm 50 to hold the movableset of rolls 44 in a laterally yieldable as well as a laterallyadjustable position. From Fig. 6 it will be seen that the rolls aredirectly geared with each other as at 54, and that one pair of rolls isoperatively connected to the next pair of rolls above or below it byidlers, not shown, meshing with a spur pinion 55.

This present machine, like my prior patented machine above referred toembodies means for parallel folding. In parallel folding, it issometimes necessary to make three folds each of which is parallel to thepreceding, and it is also sometimes necessary to make only two folds. Inorder to accomplish this result, I have provided means which I shall nowdescribe whereby the third parallel folder may be cut out and the twicefolded sheet passed through the rolls of the third parallel folderdirectly without receiving the third fold, and passed into the stackingbox- In theoperation of parallel folding, the paper is passed throughthe rolls A and B into or between the plates 2 and 8 and thence betweenthe rolls B and C to produce the firstfold, but it is not passed intothe cross feed mechanism such mechanism being turned to one side andswung away from underneath the rolls B and C The parallel folder is thenswung into position (allas will be better understood by a reference toFig. 11 of the prior patent 893,629 and the related description 9. 2).).The parallel folder embodies two rolls 56 and 56 which coact with thebuckling plates and stops (not shown) in making the third fold of theparallel series, and to omit the third fold, I substitute for suchplates a deflector bar-57 which is secured by stud bolts or the like toears 58 projecting laterally from the hanger arms 59 of the parallelfolder, the paper being thereby passed by means of the curved edge 60 ofthe bar 57 directly out between the rolls 56 and 56 without being foldedthe third time.

In addition to the deflectors above described it is to be understoodthat I may employ other deflectors one for instance at the rolls A B Cof the first folder and one for the rolls A B and C of the folder whichis the third in the series in the operation of right angle folding, saidlast named rolls being illustrated in Fig. 17 and shown in operativerelation to the other parts of the mechanism in my priorPatent 893,629above referred to.

In the art of folding paper sheets, it is sometimes desirable not tomake a fold in the first series of the folding rolls but to pass thesheet from the feed table 1 directly through these rolls so as to haveit come in contact with slitters or creasers that are shown anddescribed in my said prior patent, the paper being passed by saidslitters or creasers to the second series of folders and folded. This isparticularly desirable in certain grades of very heavy paper, especiallywhere the fold is creased against the grain of the paper and aids inmaking a clean straight fold in paper of this class. To accomplish thisend I may take off the folding plate of the first series of rolls A Band C and substitute therefor a deflector bar 57 such as is illustrated,in Fig. 15 re ference to which will show that the paper fed from thetable 1 in between the rolls A and B will be directed by the curved edgeof said deflector bar 57 directly down between the rolls B and into andbetween the rollers 16, whence it will pass onto the spools 25 and beshifted laterally onto and between the rolls A and B In Fig. 17 I haveindicated that a deflecto'r bar such as 5.7 may be used in connectionwith the rolls A B and C which are designed primarily to produce thethird fold in the sheet in the operation of right angle folding. Thisdeflector bar is used when it is not desired to make the usual thirdright angle fold. Heretofore in such event, I have passed the paper downpast the roll C feeding it into a stacker while the paper is in avertical position, but as I have designed a stacker where it is betterto feed the paper to it in a horizontal position, I use the deflector 57to pass the paper out between the rolls B C directly to the stacker whenit is only desired to make two right angle folds.

I have found by demonstration that there are certain papers of such acharacter that when the folding machine is driven at a very high speedsuch papers pass down through the down cross feed mechanism with so muchforce that on striking the feed stacker.

provided a brush 61 (see Fig. 15) which is arranged between two pairs ofdown feed rollers 16 so as to engage with the paper as it is fed downbetween said rollers. In the present embodiment of the invention thebrush 61 is attached to the frame which ca rries the rollers 16. Thehandle end of the brush is secured by a pin or thumb screw 2 to one armof a bracket 63. said bracketbeing provided with a clamping bar (3-! bywhich it may be adjustably and detachably held upon one of the spreaderbars (55 of the frame the bracket 63 being slotted as indicated at 66 toprovide for the adjustment of the brush. Manifestly by this means. thebrush can be presented at various angles by adjustment upon the spreaderbar (35 and the intensity of its effect upon the paper can be increasedor lessened by adjusting the brush means of the thumb screw 62.

From the foregoing description in connection with the accompanyingdrawings. the operation of my improved paper folding machine will beapparent, as I have described the different steps in the operation ofthe parts in connection with the construction and relative arrangementthereof. It may be stated, however, that the paper passes first over thetable 1 into the rolls A and B and thence between the plates 2 and 3 ofthe first folder, Where it is engaged by the heel. 8 of the plate 1 bywhich it is stopped. It is then caught by and passed in between therolls B and C and passed therefrom down between the rolls ll onto the.rollers or spools 25 or 25 by which latter, in the operation of rightangle folding, it is passed laterally into the rolls A and B and thencebetween the plates 34 and 3-3 of the second folder of the right angleseries where it is stopped by the bar 36 and it is then again foldedbetween the rolls 1%" and C and passed between the laterally:Hljdfitable and'yieldable rolls 44, the rotation of these last namedrolls passing the tw ce folded sheet in between them and pa -ing itdownwardly at the same time into the third folder of the right angleseries. From the third folder it preferably passes into a If desired, bythe use of a defiector bar 42, the once folded sheet may be passeddirectly to the rolls 4:4: from the rolls 16 and spools 25. By the useof the de fiector bar 57 the sheet may be passed from the feed table tothe second series of rolls A B and C without being folded before itreaches said rolls, and by the use of the deflector bar 57 the sheet maybe passed through the rolls B and C without receiving the third foldinthe operation of right angle folding. It. is to be understood that theplate 4 may be securely gripped to the folded plates 2 and 3. in anydesired way, as by a thumb screw or bolt corresponding to the bolt 10,without any spring tensioning device,

Having thus described the invention, what is claimed as new is:

1. In a paper folding machine of the character described, thecombination with upper and lower spaced folder plates, of a sheetstopping device embodying a plate adapted to rest on the upper surfaceof the upper folder plate, said folder plate being slotted and the sheetstopping plate being provided with a downwardly and forwardly projectingguide portion extending into the slot of said folder plate and formedwith a sheet engaging heel, the forward end of said for wardlyprojecting guide portion being upwardly turned, and means for securingthe stop plate to the-slotted folder plate.

2. In a paper folding machine of the character described, thecombination with a folder plate, the plate being formed with slots, andanother plate arranged in spaced relation to the first named plate, of asheet stopping device embodying a plate adapted to rest on said firstnamed plate and overlapping one of the slots thereof, the plate beingformed with a downwardly and forwardly projecting foot portion formed atits rear end with a heel arranged to constitute an abutment for theadvancing edge of the sheet as it passes in between the folderplates andsaid forwardly projecting foot having an upwardly extending terminalportion, and means for securing the stop plate to the first named folderplate.

3. In a paper folding machine of the character described, thecombination with a slotted folder plate and another folder platearranged in spaced relation thereto, of a sheet stopping deviceembodying a plate adapted to rest on the first named folder plate andoverlap one of the slots thereof, said plate being formed with adownwardly projecting foot having a forwardly projecting toe with anupwardly curved extremity, said foot and toe being adapted to projectinto the slot and the foot being formed with a transversely extendingheel located in the space between the folder plates for the purposespecified and means for securing said stop plate to the first namedfolder plate.

4. In a sheet folding machine, the combination with spaced folderplates, one of which is formed with slots, of a stop plate adapted torest on the slotted folder plate and overlap one of the slots thereof,said stop plate being formed with a sheet engaging element projectinginto the slot, a nut adapted to enter said slot and formed withretaining lugs arranged to extend into the space between the folderplates, thenut be- .ing also formed with oppositely curving side wallsterminating in shoulders arranged to engage the side walls of said slot,and a bolt passing through the stop plate into the nut and working inthe latter, asand for the purpose set forth.

5. In a sheet folding machine, the combination with spaced folderplates, one of which is formed with slots, of a stop plateadapted torest on the slotted folder plate and overlap one of the slots thereof,said stop plate being formed with a sheet engaging'element projectinginto the slot, a nut adapted to enter said slot and formed withretaining lugs arranged to extend into the space between the folderplates, the nut being also formed with oppositely curving side wallsterminating in shoulders arranged to engage the sidewalls of said slot,a bolt passing through the stop plate into the nut and working in thelatter, and an expansion spring coiled around the bolt and pressingagainst the plate.

6. In a sheet folding machine. the combination with spaced folder platesone of which is formed with slots, of a stop plate adapted to reston oneof said folder plates and overlap one of the slots thereof, said stopplate being formed with a downwardly and forwardly projecting footextending into the slot, the foot being provided with a heel dependingtherefrom and lying in the space between the folder plates. a nutadapted to enter said slot and formed with retaining lugs arranged toextend in the space be tween the folder plates, the nut being alsoformed with oppositely curving side walls terminating in shouldersarranged to engage tlie side walls of said slot, and a bolt passingthrough the stop plate into the nut and working in the latter as and forthe purpose set forth.

7. In a paper folding machine of the character described the combinationwith folder plates, of a sheet stopping device embodying spaced bars oneof which is provided with corresponding guide fingers and thumb screwspassing through said bars and adapted to clamp the same to the folderplates.

-8. In a paper folding machine of the character described, thecombination with spaced folder plates, of a sheet stopping deviceembodying bars one of which is adapted to be inserted between saidplates and the other lying against the outer face of one of the plates,one of said bars being formed with guide fingers, and thumb screwspassing through said bars and clamping the same to the folder plates.

9. In a paper folding machine of the character described the combinationWithfolder plates, of a sheet stopping device embodying spaced bars oneof which is provided with guide fingers outwardly curved at their iooextremities away from each other, and thumb screws arranged to clampsaid bars to the folder plates.

10. In a machine for folding by the buckling process embodying a firstfolder and a second folder, the latter being arranged to produce a foldin a sheet at right angles to the fold produced by the first folder, theherein described cross feed mechanism adapted to pass the sheet from thefirst folder to the second folder, said mechanism embodying a verticalseries of down feeding rolls, a supporting bar pivotally mounted atone-end for movement in a vertical plane and disposed below thelowern'iost of said downward feeding rolls, a series of parallel shaftsjournaled in and extending through said bar in juxtaposition to eachother and arranged in a common plane, spools carried by said shaftsdirectly beneath the down feeding rolls at one side of the bar, adriving element disposed at the pivotal axis of the supporting bar, andgearing carried by the said bar and operatively connecting the drivingelement and the spools whereby to rotate the spools simultaneously inthe same direction.

11..In a paper folding machine of the character described, embodying aset of horizontally disposed rolls and a set of vertically disposedrolls, means for feeding the sheet downwardly from the first st of rollsand thence laterally to the second *set, the same consisting of aplurality of pairs of down feeding rolls, a series ofrollers or spoolsarranged in a horizontal line underneath said down feeding rolls in linewith the second set of rolls, each roller or spool being provided with asprocket nvheel, a sprocket chain extending over said sprocket wheels, adriving sprocket over which said chain also passes, a shaft on whichsaid driving sprocket is mounted, a bevel pinion also mounted on saidshaft, another shaft, a bevel pinion mounted on said last named shaft,and meshing with said first named pinion, and means for driving saidlast named shaft and a gearing connection be tween said last named shaftand the sheet feeding rolls.

12. In a paper folding machine of the character described thecombination with a supporting framework and two sets of folding rollsmounted therein, one set at right angles to the other, of a crossbarsecured in the framework below one of said sets of rolls, a series ofstub shafts mounted in said crossbar, rollers or spools mounted on therespective shafts, sprocket wheels also mounted on said shafts andadapted to move said rollers or spools, a sprocket chain extending oversaid sprockets, means for driving said sprocket chain, the rollers orspools being in line with the other set ofrolls, and down feeding rollsadapted to pass a sheet from one set of rolls to the rollers or spools,the latter being arranged to then pass the sheet to the second set ofrolls.

13. In a machine for folding by the buckling process, three rollssimilar in all respects arranged in a triangularly disposed series witha space between two of said rolls, buckling plates cooperating with saidrolls, and a rigid deflector bar interchangeable with said bucklingplates and secured at one end at a point removed from the rolls andhaving a head at one side approximately co extensive with the spacebetween the spaced rolls, said head being inserted in said space andhaving a smooth continuous concave face corresponding in curvature toand disposed concentric with the periphery of the third roll.

14. In a machine for folding by the huekling process, three rollssimilar in all respects arranged in a triangularly disposed series witha space between two of said rolls, buckling plates cooperating with saidrolls, and a deflector bar interchangeable with the buckling plates andextending radially to the third roll and having a head at one sideapproximately co-extensive with the space between the spaced rolls, saidhead being inserted in said space and having a concavely curved facefitting close to the third roll, and said bar being formed with anattaching base at one end.

15. In a paper folding machine, sheet passing mechanism adapted to passa sheet from one folder to another and embodying a pair of rollssupported at one end only and adapted to be shifted into relativelydivergent relation. means for permitting the free end of one roll toyield laterally so as to swing away from the corresponding end of theother rolhand adjustable means for limiting the movement of the rollstoward each other.

16. In a paper folding machine, sheet passing rolls adapted to pass asheet from one folder to another, the rolls being arranged in laterallydisposed obliquely extending pairs, one roll of each pair being mountedon a fixed axis and the other roll being mounted on an axis which ishingedly supported whereby to permit said hinged rolls to move at oneend toward and away from the corresponding ends of the first namedrolls. a

17. In a paper folding machine, sheet passing rolls adapted to pass asheet from one folder to another, the same being arranged in pairs,means for rotatably supporting one rollof each pair to rotate about afixed axis, such rotatable rolls being supported at one end only, ahinged support on which the other rolls are mounted at one end only, andmeans for rotating said rolls.

18. In a paper -folding machine, sheet passing rolls adapted to pass asheet from one folder to anotl'ier. said rolls being arranged in pairs.means ft rotatably supporting one roll of each pair torotate about afixed axis. a yielding support on which the other rolls are mounted atone end only, and means for rotating said rolls.

19. In a paper folding machine. sheet passing rolls adapted to pass asheet from one folder toanother. said rolls being arranged in pairsadapted to receive a sheet between them. a stationary support in whichone roll of each pair is supported at one end to rotate about a fixedlongitudinal axis, said support being provided with pintle ears, a barin which the other rolls are supported at one end to rotate about theirlongitudinal axes. said bar being formed with a pintle car, a pintleextending through said ears whereby to hinge said bar to the relativelystationary support, an arm 50 projecting from the last named pintle ear,and means connected to said arm whereby to adjust the position of themovable rolls relative to the other rolls.

20. In a paper folding machine, sheet passing rolls adapted topass asheet from one folder to another, said rolls being arranged in pairsadapted to receive a sheet between them, a stationary support in whichone roll of each pair is supported to rotate about a longitudinalaxis,said support being provided with pintl'e'ears, a bar in which the otherrolls are supported atone end only to rotate about their longitudinalaxes, said bar being formed with a pintle ear, and an arm projectingtherefrom, a pintle extending through said ears whereby to hinge saidbar to the relatively stationary support, a relatively stationary springencircled bolt, and a nut working on said bolt and engaging said arm tomove it in one direction,

against the tension of said spring.

21. In a. paper folding machine, sheet passing rolls adapted to pass asheet from one folder to another, the same being ar ranged in, pairs,means for rotatably supporting one roll of each pair to rotate about afixed axis, such rotatable rolls being supported at one end only, and ayieldable sup; port on which the other rolls are mounted roll but out ofcontact with all the rolls,

atfime end only, and means for rotating said r0 s. v

22. In a paper folding machine, sheet passing rolls adapted to pass asheet from one folder to another. said rolls being arranged in pairsadapted to receive a sheet between them, a stationary support in whichone roll of each pair is supported at oneend to rotate about alongitudinal axis, said support being provided with pintle ears, a barin which the other rolls are supported at one end only to rotate abouttheir longitudinal axes, said bar being formed with a pintle ear, apintle extending through said ears whereby to hinge the bar to therelatively stationary support, and means for adjustably and yieldinglyconnecting said bar to the support.

23. In a paper folding machine, sheet passing rolls adapted to pass asheet from one folder to another, said rolls being arranged in pairs, arelatively stationary support in which one roll of each pair is mount edto rotate, a bar having a hinged connection' to said support andsupporting the other rolls so that the latter may be swung away from ortoward their corresponding rolls, said bar also embodying an arm, a boltconnected to said arm and to the support, an expansion spring encirclingsaid bolt and bearing against said arm, and a nut working .on said boltand adapted to compress said spring.

24. A folding machine comprising a series of three rolls similar in allrespects arranged in triangular relation with a space between two of therolls, and buckling plates and deflector bars constructed to beinterchangeably supported at a point removed from the rolls with one endin juxtaposition to saidrolls, the deflector bars having heads to bridgethe space between the spaced rolls and fit close to the periphery of thethird In testimony whereof I affix my signature in presence of twowitnesses.

OLIVER w. JOHNSON.

